Manifold high-pressure pump



P. H. LINDBERG MANIFOLD HIGH PRESSURE PUMP June 2, 1953 s Sheets-Sheet 1 Filed Aug. 18. 1948 INVENTOR.

BY H l 2 %7'TORNEY JuneZ, 1953' P. H. LINDBERG 2,640,421

' MANIFOLD HIGHLPRESSURE PUMP Filed Aug. 18 1948 I 's Sheets-Sheet 2 INVEINTOR. Qua/341M:

A 'T'TO RNEY June 53 P. H. LINDBERG 2,640,421

MANIFOLD HIGH-PRESSURE PUMP Filed Aug 1a, 1948 s ShegjtggSheQt-i IN VEN TOR. law/7% W'TORNEY June 2, 1953 P. LINDBERG MANIFOLD HIGH-PRESSURE PUMP 6 Sheets-Sheet 4 Filed Aug. 18, 1948 June 2, 1953 P. H. LINDBERG MANIFOLD HIGH-PRESSURE PUMP Filed Aug. 18, 1948 -6 sun-meat 5 INVENTOR.

P. H. LINDBERG MANIFOLD HIGH-PRESSURE PUMP June 2, 1953 I -s Sheets Sheqt 5 Filed Aug, 18, 19

Patented June 2, 1953 UNITED STATES JATEJN'T OFFTCJE MANIFOLD HIGH-PRESSURE PUMP Peter H. .Lindberg, Detroit, Mich.

Application August 18, 19.48, Serial No. 44,931

(01. Allis-3.)

.2 (llaims. 1

The object of my invention is to produce a manifold pump adaptable for mounting on an ordinary farm tractor, to ice for varying farm spraying, and powered the tractor engine.

Another object .is to produce a manifold pump provided with all the control pants mounted thereon, operative by any rotary power means, and that can be reversed for filling connected fluid storage receptacles, such as tanks or drawing fluid therefrom.

A .further object is :to provide a high-pressure pump that can be adjusted and operated at any desired .fiuid pressure and controlled 'for any type of fluid discharge.

A still further object .is to produce a compact .farm spraying pump, adaptable to :all farm purposes, that is simple in construction, easily and .efiiciently operated and that can .be nianutacv the Fig. 1, showing the special safety valve unit and liquid re'turnpipe connected therewith. "Fig. 4 is the opposite end view takenon the line 4-4 of the Fig. 1, showing the arrangement of the driving, and the liquid discharge units.

Fig. is a vertical longitudinal sectional view taken on the line 55 of the Fig. .2, showing the relative position of the various liquid -.chambers and connected operating parts. Fig. 5a is a diagrammatic view showing the how of fluid through the pumping device during filling of a storage receptacle with fluid from an outside source.

.Fig. 5b is a diagrammatic view showing the flow of fluid through the pumping (device when fluid is pumped .from the storage receptacle and out of the discharge orifice.

Fig. 6 is a detail elevation :of the pump rotor unit, showing its general spiral construction.

7 .is an .end view of the spiral vrotor showing the ofi-set spiral circumferences.

Fig. .6 is a longitudinal sectional detail view through the pump stator, also taken on the line 5-5 of the Fig. 2, showing the interior wallspiral construction Fig. 9 is an end view of the run stator cylinder as illustrated the 8, showing the end circular design of the dual spiral rotor recesses formed therethrough.

Fig. 1c is the opposite end view of the same cylindrical stator unit, showing the elongated end recess opening at the bottoms of the dual groove recesses.

11 is a cross-sectional view taken on the line Iii-4L! of the 1, showing the manifold liquid inlet chamber with the dual inlet pipes leading therein.

.12 is a cross-sectional view taken on the line I2-! 2 of the Fig. 1, showing the'liquid control valve :and port formed 'therethrough.

Fig. 13 is a cross-sectional view taken on the line 13-43 of the .1, showing the :special liquid pipe inlet port for refilling the connected liquid tanks, from .an outside liquid .oeservoir.

Fig. 1d a theoretical illustration of a tool construction element .for forming the dual'helical stat-or chamber recesses. 1

.15 is also a theoretical illustration of the path .tollowed :by the tool construction element as it is passed rotatably through "the helical stator chamber.

I .now describe more fully the detailed-constructien .of my invention, referring to the drawings and the marks thereon.

Ingeneral, my manifold pump comprises an elongated casing formed with a pair of parallel cylindrical chambers lengthwise therethrough, joined together atone end by .a hollow, curved connecting unit, and provided with an intervening inlet chamber, coimected to both cylinders by controlled .fluid passages. A high pressure pump unit is mounted operatively within one .of the casing cylinders, and with the {opposite connected casing cylinder adapted as a controlled fluid outlet chamber.

The assembled manifold casing comprises .a driving unit section A having the pump .58 attached and connected to the :fluid outlet chamber-C by aspecial-curved pipe union D torming the pump discharge, and the two sections A and'G connected by the intervening fluid inlet chamber E. The driving unit A comprises a cylindrical pump head casing 1, preferably made of suitable cast metal, open'at both ends, and formed with stepped inner cylindrical wall sections a, b, c, and d, and is provided with a fluid inlet port 2, and. drain 'port .3. Within the casing chamber F is rotatably mounted ahollow cylindrical drive shaft 43 ,by means of attached roller hearings i and 5, supported icy the shouldered casing wall sections o and 0 respectively, and .retainedfin position therein by the separating cylinder .6 placed therebetween and securely locked in position by the attached set screw 1. The ball bearing unit is sealed by a special hydraulic seal ring 8 mounted within the pump head casing chamber shoulder section d, preventing any liquid from entering the shaft bearings. The hollow drive shaft 43 is closed and sealed at the outer end by a threaded pipe plug 9 tightly screwed therein. Mounted over the outer projected end of the drive shaft 43 is a drive pulley I0, fixedly attached thereto by the set screw H, providing power means for rotatably operating the drive shaft 43. Within the hollow shaft 43 is mounted an adjustable connecting rod [2, pivotally attached to the drive shaft 43 by the pivot pin l3 mounted diametrically across the shaft recess. The opposite end of the connecting rod 12 is likewise pivotally connected to the pump rotor driving head I4 by the pivot pin l5 which is securely retained therein by the collar l6 tightly pressed thereover. The casing I is also provided with a spring valve safety liquid drain unit G mounted directly below the dual hydraulic seal rings 8, in case any liquid passes therethrough,

and may be drawn therefrom through the small drip hole ll formed through the threaded ad- J'ustin plug l8 mounted therein. Special support mounting arms l9 are provided in the casing side walls for adjustably mounting the assembled pump on any suitable rod support passed through the respective arm bearings 20. The casing is adjusted to any desired position by special frame adjusting screws engaging the easing recesses e provided on opposite sides of the casing wall.

Threadably mounted within the inner end openin of the pump head casing I is the cylindrical pump unit B, formed of a short pipe section 2| threaded at bothends. Within the pipe section 2| is mounted a tubular rubber pump stator 22, formed with dual helical thread recesses lengthwise therethrough. Within the tubular helical stator 22 is rotatably mounted a single thread helical pump rotor 23 connected to the driving head 14 and rotatable therewith. The rotor helical threads are designed with only one half the thread pitch of that of the stator section, allowing the helical thread rotor to engage and fit the adjacent double helical thread stator wall grooves along one side thereof, but mismatch with the opposite stator wall grooves, as illustrated in the Fig. 5 of the drawings, thereby providing liquid recess passages the entire stator length, and which is forced therethrough as the rotor 23 is rotated by the drive shaft 43 and attached power pulley II]. It is known that the helical rotor and rubber stator units are well known as pressure pump elements and are in common use in diflerent types of high-pressure pumps, and to which elements per se, this inventor makes no claim, but does herein apply these elements within a new combination and invention, and claims the new pump resulting therefrom. The double stator threads are described as being formed, theoretically, by a double edged tool similar to two semi-circular sections g and h, illustrated in the Fig. 14, and as rotated about the central axis Z (concentric with the stator axis), and advanced uniformly lengthwise the stator axis during rotation thereof, resulting in a double threaded helical formation as indicated by the circular lines X, Y and W as illustrated in the Fig. of the drawings.

The U-shaped connecting union D is threadably mounted on the outer end of the pump unit B, and with the opposite union end slidably mounted within the open end of the fluid outlet chamber C within the end recess 1, and sealed therein by a suitable pressure hydraulic seal ring 24. Suitable adjusting screw recesses i are provided in the connecting union exterior wall for rigidly retaining the pump housing in any desired position on its supporting mounting rod within the arm bearings 20. The fluid outlet or discharge chamber 0 is also made of suitable cast metal, preferably of a design formed with a cylindrical chamber or fluid discharge passage is the entire length thereof, and with an attached fluid inlet chamber E formed on the under side. Special closing spring valve 33 is mounted Within the outer end of the discharge passage is for closing the discharge orifice 33a formed by the open end of the passage It. The spring valve 33 is shown formed with a valve body having an orifice closing head 33c thereon arranged to close the orifice 33a and is biased or urged toward closed position by a resilient sprin means 331) disposed between the valve head and a shoulder 33d in the passage 33a of the discharge passage k to provide for free flow of fluid through the spring 3312, closable whenever the outlet hose connector 34 is removed. The inlet chamber E is designed with double chamber compartments m and n, separated by a rotary closing or cut-off valve 25 rotatably mounted across the connecting fluid passage 26. The chamber m is connected by an outlet port 21 opening directly into the intake cavity or driving unit chamber H, and is also provided with a special inlet port closed by a plu 28 which may be removed when desired, for attaching a liquid supply hose thereto. Special tank inlet pipes 29 and 30 are mounted on opposite sides of the inlet chamber E and open directly through ports 30a into the inner chamber 11., and when the valve 25 is open, the connected tank liquid may flow therethrough directly into the connected chambers m and H, and into the pump rotor 23, The fluid inlet chamber 11. is also connected to the discharge passage or chamber it through a port am by means of a curved pipe section 3| and connected safety or pressure-responsive valve unit, 32 of any suitable design, allowing the tank fluid to be returned, or recirculated, through the pump unit, should the pressure inthe discharge passage 1c exceed a predetermined value, such as when the spring valve 33 is closed while the rotary pump is in operation. The fluid discharge pressure is regulated by the adjustable valve wheel 35, to any desired pressure which may be indicated by the connected pressure gage 36 also connected to the fluid outlet chamber or discharge passage 10 through the port p. The discharge pipe connector 34 is preferably designed to receive a special hose connector unit, formed with a special valve opening tube 31 and locking nut 38, and when the discharge hose 39 is removed along with the valve tube 31, the spring valve 33 automatically closes, and the fluid within the pump unit is recirculated if the power rotations are continued.

In using my manifold pump when rotated by suitable power applied through the drive pulley Ill, and the pump connected with suitable fluid supply or storage tanks, said supply or storage tanks may first be filled by closing the cut-off and spring valves 25 and 33, and removing the inlet plu 28 and attaching therein 'a special supply hose leading to any fluid supply source. The rotary pump unit B will draw the fluid from the connected fluid supply directly into the chambers m and H and into the connected pump unit, forcing the fluid through the pressure-responsive valve 32 and into the connected chamber n and out through the connected supply pipes 29 and 30, into the connected storage receptacle or supply tanks as may be readily mounted on the connected tractor. When the supply tanks are full, the plug 28 is replaced, and the cut-off and spring valves 25 and 33 are reopened. The desired fluid discharge pressure is set by the pressure-responsive valve hand wheel 35 and the fluid is then discharged through the connected hose leading to any desired discharge unit such as attached crop sprayers, fire hose, or any other desired farm or commercial use, and the fluid pressure varied as the spraying work may require.

Having fully described my manifold highpressure pump, what I claim as my invention and desire to secure by Letters Patent is:

l. A device for pumping fluids into and from storage receptacles including a head casing, a pump having an intake and a discharge, a fluidintake cavity in said head casing arranged in direct communication with said pump intake, a fluid intake port in said head casing opening into said intake cavity, a fluid discharge passage directly connected to said pump discharge, a discharge orifice at the end of said discharge passage, a spring valve in said discharge passage, a fluid inlet member comprising a first and a second chamber, a single passage directly interconnecting said chambers, a cut-oil valve in said single passage, a port in said first chamber arranged in direct communication with said head casing intake port, a port in said second chamber, a second port in said first chamber adapted to be closed during pumping of fluid into said second chamber through the port therein and to be connected to a source of supply during pumping of fluid from said second chamber through the port therein to a storage receptacle connected thereto, a pressure-responsive valve arranged in communication with said fluid discharge passage, a second port in said second chamber, and means connecting said last-mentioned second port and said pressure-responsive valve to provide for flow of fluid from said discharge passage through said pressure-responsive valve into said second chamber to recirculate through said pump when said cut-oh valve is open and the fluid pressure in said discharge passage exceeds a predetermined value, said pressure-responsive valve being further arranged to open a passage for the flow of fluid from said discharge passage into said second chamber and therefrom through said first-mentioned port therein to supply fluid into a storage receptacle connected to said firstmentioned port in said second chamber when said cut-off and spring valves are closed and said second port in said first member is connected to a fluid supply.

2. A device as set forth in claim 1 wherein said spring valve includes a valve body having a closing head thereon, a shoulder in said discharge passage, and resilient means disposed between said closing head and said shoulder for urging said valve head to close said orifice.

PETER H. LINDBERG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 830,046 Bole :Sept. 4, 1906' 877,661 Patterson Jan. 28, 1908 1,522,752 "Shield Jan. 13, 1925 2,013,260 Waterons Sept. 3, 1935 2,028,407 Moineau Jan. 21, 1936 2,381,649 Dalton Aug. 7, 1945 FOREIGN PATENTS Number Country Date 815,305 France 1937 

